我有两个TextBox ..
我希望在KeyPress活动期间提取/复制用户输入的所有大写字母到另一个TextBox。
逻辑:
Private Sub TextBox1_KeyPress()
'If the Character is a Capital Letter Then
' Copy and Concatenate it to the second TextBox
'End If
End Sub
答案 0 :(得分:2)
你可以试试这个:
For i = 0 To TextBox1.Text.Length - 1
Dim c As Char = TextBox1.Text.Chars(i)
If Char.IsUpper(c) Then
TextBox2.AppendText(c)
End If
Next
如果你需要它作为一个功能:
Private Function ExtractUppers(ByVal txt As TextBox) As String
Dim sExtract As String = ""
For i = 0 To txt.Text.Length - 1
Dim c As Char = txt.Text.Chars(i)
If Char.IsUpper(c) Then
sExtract = sExtract & c
End If
Next
Return sExtract
End Function
在你的按钮中:
TextBox2.Text = ExtractUppers(TextBox1)
答案 1 :(得分:2)
我的朋友解决了! :)感谢您的回复!
Private Sub TextBox1_TextChange()
CapitalLetter = Regex.Replace(TextBox1.Text, "[^A-Z]", String.Empty)
TextBox2.Text = CapitalLetter
End Sub
答案 2 :(得分:0)
也许你可以使用这个技巧:
If letterVar = letterVar.ToUpper() then
TextBox2.Text &= letterVar
End if